HTPC & 23.967FPS

Snax

Snax

Snax

Soldato
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Hi

I am trying to get my HTPC to play 1080p files encoded at 23.976fps smoothly. It is an ION system- the refresh rates available are 23 and 24HZ.

Does anyone know if nvidia actually supports 23.976hz?

Reclock did not help the situation for me and I still get micro stutter when panning.

It seems absurd that a PS3 can output a blu-ray perfectly but the latest PCs seem to STILL have problems with their video drivers outputting at a correct HZ.

Advice is much appreciated.

edit- the title should read 23.976 fps
 
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What software are you using for playback?

Given that you've tried re-clock then it's probably not XBMC - try that and play with the clocking settings, it's given me the most stable playback i've been able to get (although thats still not as good as PowerDVD from BluRay or a different source into the TV.
 
If the graphics card sends a signal at say 24hz and the movie you watch plays at 23.976 you get a skipped frame every minute. In addition, panning shots look ****e.

Why blu ray movies are recorded like this I do not know, but graphics card manufacturers should have cottoned on that they need to support this hz rate properly.
 
I have to say ive never had a problem playing back my blu-rays in PDVD or TMT3, admittedly im using an ATI card, dont know if that makes any difference.

Hawker
 
I'm running XBMC on an Athlon II and Nvidia GT210 and have had no microstuttering while watching bluray rips, using the latest drivers?
 
Snax said:
Hi

I am trying to get my HTPC to play 1080p files encoded at 23.976fps smoothly. It is an ION system- the refresh rates available are 23 and 24HZ.

Does anyone know if nvidia actually supports 23.976hz?
Click to expand...
Sorry if I'm stating the obvious or missing the point (this isn't really my area of expertise), but does your display support 24p natively, or is it doing 3:2 pulldown? If the latter, have you tried feeding it at 60Hz and letting your graphics drivers handle the pulldown?
 
BunnyKillBot said:
Genuine question: What on earth is the benefit of a decimalised non integer fps?
Click to expand...

Nobody decided it as such, as I understand it it's a function of displaying 24p on a NTSC TV. PAL speeds 24p up to 25 fps.

In terms of why does NTSC slow the frame rate down...I don't understand this aspect of it.
 
It's a legacy thing to do with the mains frequency and the early days of TV in America.

The US mains frequency was used as a cheap alternative to building expensive oscillators in each device and trying to sync the timing across several bits of gear. Since US mains runs at 59.94 cycles per second (more or less) then everything that timed to it will run at that or a fraction/same rate/multiple of that.

It became less of an issue as the technology to produce timing signals became cheap and abundant. But by that time the die was already cast.

We did the same in the UK with our TV system. Our mains frequency is 50Hz, and out=r TV system is based on a 50Hz field rate.
 
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